TWM588233U - Ventilation pipe of fresh air system - Google Patents

Abstract

This creation proposes a fresh air system ventilation pipe. The pipe body is made of elastic plastic. The external shape of the cross section along the extension direction of the pipe body is substantially close to a rectangle plus its two short sides extending semicircularly. The inner space of the pipe body For air circulation. The pipe body continuously forms a plurality of surrounding protrusions in a substantially parallel cross-section direction in the extension direction. Each surrounding protrusion is a hollow closed structure, which is covered with air inside. The thickness near the internal space is thinner than the thickness of other parts. The outer edge surrounding the protrusion is arcuate. The surrounding protrusions of this creation will not collide when the pipe is bent, so that a large air flow will cause vibration and no sound. In addition to providing the restoring force, the air surrounding the protrusions also has the function of providing thermal insulation to the gas flowing in the tube, so as to meet the market demand.

Description

Fresh air system ventilation pipe

This creation is about a ventilation duct, especially a fresh air system ventilation duct that is easy to bend and easy to fix, and is used to guide the air flow in the fresh air system.

In many closed buildings, such as shopping malls, stations, and hospitals, in order to maintain air quality, it is necessary to exhaust polluted air with high carbon dioxide content indoors and introduce fresh air. In addition, during the process of introducing air, it is necessary to purify and filter pollutants and bacteria in the air to prevent outdoor dust and haze from invading the room. To meet these needs, a new air system was born. The fresh air system is different from the general air-conditioning system; in addition to meeting the aforementioned requirements, the fresh air system cannot adjust the indoor temperature. Therefore, the ventilation duct of the fresh air system and the pipeline of the air conditioning system are separated. The requirements for the ventilation ducts of the fresh air system are easy to bend and easy to install, and it is best to disassemble and clean them. Traditionally, single-layer plastic corrugated pipes are used for ventilation ducts in fresh air systems. Such products meet the above requirements. However, this kind of product also has the problems of poor thermal insulation, and the impact of wind currents during operation causes huge noises.

In order to solve the aforementioned problems, the Republic of China New Patent No. M575519 has developed an improved fresh air duct accessory. The fresh air duct accessory includes a telescopic unit and a spiral unit. The telescopic unit includes a main body and a plurality of convex rings. The interior of the main body forms a containing space. The plurality of convex rings are arranged at intervals outside the main body. The spiral unit is provided on the telescopic unit. The inner side includes a pipe body, the pipe body is located in the accommodating space of the telescopic unit, and the inside of the pipe body has a spiral pattern, and the spiral pattern spirally surrounds the inner side of the pipe body. The fresh air pipe accessory has two layers of inner and outer units, which makes it difficult to cut during construction and causes troubles in installation and fixing. In the case of poor production quality, misalignment between the telescopic unit and the spiral unit is easy to occur. Instead, the operating fresh air system will make noise due to the friction between the two, and even accelerate the damage of the fresh air pipeline accessories. In addition, the cross section of the ventilation pipe used in the existing fresh air system is mostly circular. Although it is simple to manufacture, it is not easy to fix to the building.

In order to solve the problems of heat insulation and sound, while avoiding the inconvenience of the prior art, a ventilation pipe of the fresh air system of this creation has been proposed.

This paragraph extracts and compiles some features of this creation. Other features will be revealed in subsequent paragraphs. Its purpose is to cover the spirit and scope of the scope of additional patent applications, with various modifications and similar arrangements.

In order to meet the above requirements, this creation proposes a ventilation duct for a fresh air system. The pipe body of the ventilation pipe of the fresh air system is made of elastic plastic, and the external shape of the cross section along the extension direction of the pipe body is substantially close to a rectangle plus its two short sides extending outwardly in a semicircle. The inner space of the pipe body is for air circulation. It is characterized in that the pipe body continuously forms a plurality of surrounding protrusions in a substantially parallel cross-section direction in the extension direction, and each surrounding protrusion is a hollow closed structure, which is covered with air inside and has a thickness closer to the inner space than other parts The thickness of the surrounding is thin, and the outer edge of the surrounding protrusion is arc-shaped.

In addition, this creation also proposes another type of fresh air system ventilation pipe. The pipe body of the ventilation pipe of the fresh air system is made of elastic plastic, and the external shape of the cross section along the extension direction of the pipe body is substantially close to a rectangle plus two arcs extending outward, and the inner space of the pipe body is for air circulation. It is characterized in that the pipe body continuously forms a plurality of surrounding protrusions in a substantially parallel cross-section direction in the extension direction, and each surrounding protrusion is a hollow closed structure, which is covered with air inside, and the thickness near the internal space is larger than that of other parts. The thickness is thin, and the outer edge of the surrounding protrusion is arc-shaped.

According to this creation, a tube wall portion is formed between two adjacent surrounding protrusions, and the thickness of the tube wall portion is uniform.

According to this creation, the thickness of the tube wall portion is substantially the same as the thickness of the thicker portion around the protruding portion.

According to this creation, the tube body can be integrally formed.

According to this creation, the elastic plastic can be high density polyethylene (HDPE).

In this creation, the surrounding protrusions of the ventilation pipe of the fresh air system will not collide when the pipe body is bent, so that a large air flow will cause vibration and no sound. In addition to providing a restoring force, the air surrounding the protrusions also has the function of providing heat insulation to the gas flowing in the tube, so as to meet the above requirements.

This creation will be described more specifically by referring to the following embodiments.

Please refer to FIG. 1 to FIG. 4, FIG. 1 is a schematic diagram of an appearance of a fresh air system ventilation pipe 1 according to the present creation, FIG. 2 is a schematic side view of the aforementioned fresh air system ventilation pipe 1, and FIG. 3 is a surrounding protrusion of the fresh air system ventilation pipe 1 The section 10 is a cross-sectional view along two vertical directions of the central axis of the fresh air system ventilation pipe 1, and FIG. 4 is a schematic view of the fresh air system ventilation pipe 1 in a bent state. For the convenience of explanation, a coordinate axis is added to the related drawings to identify the orientation: the x-axis direction represents the direction of the longest length of the cross section of the pipe body of the fresh air system ventilation pipe 1; the y-axis direction represents the fresh air system ventilation pipe The extension direction of the pipe body of 1 (substantially perpendicular to the x-axis); the z-axis direction represents the direction in which the shortest length of the pipe body of the ventilation pipe 1 of the fresh air system appears in the extension direction (substantially perpendicular to the x-axis).

The ventilation pipe 1 of the fresh air system proposed in this creation, the pipe body is made of elastic plastic. In practice, the elastic plastic can be high density polyethylene (HDPE). The purpose of using the elastic plastic to make the fresh air system ventilation pipe 1 is to allow the fresh air system ventilation pipe 1 to bend when installed in the building. However, because the cross section of the duct of the fresh air system ventilation pipe 1 in the extending direction is not point symmetrical (axisymmetric along the x-axis and the z-axis), the tube body bending occurs on the flatter side (as shown in Figure 4). It is shown that turning on the yz plane), one side of the xy plane (having a substantially straight line segment) can be paved along the wall surface, and can be turned when it encounters a beam or an obstacle. Based on the elasticity of the elastic plastic, the ventilation pipe 1 of the fresh air system needs to be fixed with an auxiliary device, such as a nail rack, after being positioned under the ceiling or on the side of the roof beam. However, the ventilation pipe 1 of the fresh air system is not easy to be shaped because of bending, and it is not easy to deform due to impact by external forces, which is convenient for the constructors to apply.

Generally speaking, the shape of the cross section of the fresh air system ventilation pipe 1 along the extension direction of the pipe body is substantially close to a rectangle plus two semi-circles extending outward from its two short sides (as shown in the upper part of Figure 1). As shown in FIG. 2, whether the cross section is cut at AA ′ section (tube wall portion 12), BB ′ section (around the center of the protrusion 11) or CC ′ section (around the side of the protrusion 11), Close to the aforementioned shape, but different in size. Due to the use of elastic plastic, the cross-sectional shape of the fresh air system ventilation pipe 1 can be temporarily deformed after being squeezed by the external force; after the external force disappears, the cross-sectional shape returns to its original shape. The internal space of the pipe body is used for air circulation, that is, the passage of air in and out of the building in the fresh air system.

Compared with the conventional technology, the ventilation pipe 1 of the fresh air system has the following special designs. See Figure 2. Taking a closer look at the ventilation duct 1 of the fresh air system, the pipe body continuously forms a plurality of substantially parallel cross-section direction surrounding protrusions 11 and a plurality of pipe wall portions 12 in the extension direction. The pipe body is composed of these surrounding protrusions 11 and the pipe wall portions. 12 made by alternating connections. The surrounding protruding portion 11 and the tube wall portion 12 are not formed separately and then joined, and the tube body is integrally formed. Please refer to FIG. 3, which is a cross-sectional view of the surrounding projecting portion 11 of the fresh air system ventilation pipe 1 along the two vertical directions of the central axis of the fresh air system ventilation pipe (parallel x-axis direction on the left diagram and parallel z-axis direction on the right). Each surrounding protrusion 11 is a hollow closed structure (the body surrounding the protrusion 11 is shown by a solid line, and the dashed line shows the cut edge portion seen around the protrusion 11 in the xz plane cross section), the inner package Cover air 2. Considering that the elastic force surrounding the protruding portion 11 should not be too large to affect the construction, the thickness of the surrounding protruding portion 11 near the internal space is thinner than the thickness of other portions. The film structure 14 is connected to the tube wall portion 12 to form the inner wall of the tube. The outer edge 13 surrounding the protruding portion 11 is arc-shaped. Such a structural design makes the fresh air system ventilation pipe 1 not bend and collide when the outer edges 13 surrounding the protruding portion 11 are bent.

As described above, a tube wall portion 12 is formed between two adjacent surrounding protruding portions 11, and the thickness of the tube wall portion 12 is uniform. According to this creation, the thickness of the tube wall portion 12 is substantially the same as the thickness around the thicker portion of the protruding portion 11. Therefore, compared to the traditional wind pipe wall structure with a wavy cross section, the cross section of the pipe wall of the fresh air system ventilation pipe 1 is close to a continuous “Ω” shape, but the bottom of Ω is sealed to become a closed space. For general installation projects, the overall fresh air system ventilation pipe 1 can be installed without adhesion.

Finally, the case where the ventilation duct 1 of the fresh air system is bent will be described. As shown in FIG. 4, when the fresh air system ventilation pipe 1 is bent by applying an external force on the yz plane, one side surrounding the protruding portion 11 and the pipe wall portion 12 receives pressure and one side receives tension. The tube wall portion 12 is not substantially deformed, and the pressure-bearing side surrounding the protruding portion 11 is squeezed by the two tube wall portions 12. The film structure 14 is slightly deformed so that the tube wall portion 12 extends into the surrounding protruding portion 11 to form FIG. 4 shows a phenomenon in which the right pipe wall portion 12 is shorter than the left pipe wall portion 12. When the external force disappears, the elastic recovery force and the internal air pressure around the protruding portion 11 can return to the original state. However, if the force is applied in a direction other than the yz plane and subject to a large area moment of inertia, it is relatively difficult to cause the ventilation pipe 1 of the fresh air system to bend. Due to the arc-shaped design of the outer edge 13, the protruding portion 11 does not collide when the fresh air system ventilation pipe 1 is bent; even if there is a large wind flow causing vibration, no sound will be generated. In addition to providing a restoring force, the air surrounding the protruding portion 11 also has a function of providing heat insulation to the gas flowing in the ventilation pipe 1 of the fresh air system.

According to the spirit of the present creation, in another embodiment, the outer shape of the cross section of the fresh air system ventilation pipe 1 along the extending direction of the pipe body may have other changes. The external shape of the cross-section is, for example, a rectangle that is substantially close to a rectangular shape with two short sides extending outward. That is, the shape of the two ends along the x-axis is not a semicircle, but a part of an arc or an ellipse is used instead.

Although this creation has been disclosed as above in the form of implementation, it is not intended to limit this creation. Any person with ordinary knowledge in the technical field can make some changes and decorations without departing from the spirit and scope of this creation. The scope of protection of this creation shall be determined by the scope of the attached patent application.

1‧‧‧Ventilation pipe for fresh air system
2‧‧‧ air
11‧‧‧ around the protrusion
12‧‧‧ tube wall
13‧‧‧ outer edge
14‧‧‧ thin film structure

Figure 1 is a schematic diagram of the appearance of a fresh air system ventilation pipe according to the present creation, Figure 2 is a schematic side view of the aforementioned fresh air system ventilation pipe, and Figure 3 is a projection around the fresh air system ventilation pipe along the central axis of the fresh air system ventilation pipe. A cross-sectional view of the direction, FIG. 4 is a schematic diagram of the ventilation pipe of the fresh air system in a bent state.

Claims (6)

A ventilation pipe for a fresh air system. The pipe body is made of elastic plastic. The shape of the cross section along the extension direction of the pipe body is substantially close to a rectangle and two semi-circulars extending outward. The inner space of the pipe body is for air circulation. It is characterized in that the pipe body continuously forms a plurality of surrounding protrusions in a substantially parallel cross-section direction in the extension direction, and each surrounding protrusion is a hollow closed structure, which is covered with air inside and has a thickness closer to the inner space than other parts The thickness of the surrounding is thin, and the outer edge of the surrounding protrusion is arc-shaped. A ventilation pipe for a fresh air system. The pipe body is made of elastic plastic. The outer shape of the cross section along the extension direction of the pipe body is substantially close to a rectangle plus two short sides extending outwardly. The inner space of the pipe body is used for air circulation. It is characterized in that the pipe body continuously forms a plurality of surrounding protrusions in a substantially parallel cross-section direction in the extension direction, and each surrounding protrusion is a hollow closed structure, which is covered with air inside, and the thickness near the inner space is larger than that of other parts The thickness is thin, and the outer edge of the surrounding protrusion is arc-shaped. The ventilation duct of the fresh air system according to item 1 or 2 of the scope of patent application, wherein a tube wall portion is provided between two adjacent surrounding protrusions, and the thickness of the tube wall portion is uniform. The ventilation pipe of the fresh air system according to item 3 of the patent application scope, wherein the thickness of the pipe wall portion is substantially the same as the thickness of the thicker portion surrounding the protruding portion. The ventilation pipe of the fresh air system according to item 1 or item 2 of the scope of patent application, wherein the pipe body is integrally formed. The ventilation duct of the fresh air system according to item 1 or item 2 of the patent application scope, wherein the elastic plastic is high-density polyethylene (HDPE).